添加 install_k8s/install_k8s_ubuntu-final.sh
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#!/bin/bash
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# ---------------------------------------------------------
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# Kubernetes (K8s) 高可用集群自动化脚本 (Ubuntu 专用 Final 版)
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# 包含: 基础环境、组件安装、HAProxy+Keepalived VIP、K8s 初始化
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# 解决: Containerd 2.x 兼容性、HAProxy 离线绑定崩溃、Crictl 警告等历史难题
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# ---------------------------------------------------------
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# ================= 变量配置区 (执行前务必修改) =================
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K8S_VERSION="1.28.2-*"
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POD_SUBNET="10.244.0.0/16"
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SERVICE_SUBNET="10.96.0.0/12"
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# 1. 高可用 VIP 配置
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VIP="192.168.40.100"
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VIP_PORT="16443"
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# 自动获取当前机器的主网卡名称，避免 Keepalived 绑定失败
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VIP_INTERFACE=$(ip route | grep default | awk '{print $5}' | head -n 1)
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# 2. Master 节点真实 IP 列表
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MASTER01_IP="192.168.40.10"
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MASTER02_IP="192.168.40.11"
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MASTER03_IP="192.168.40.12"
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# 控制平面入口地址
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CONTROL_PLANE_ENDPOINT="${VIP}:${VIP_PORT}"
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# ===============================================================
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[0;33m'
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NC='\033[0m'
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if [ "$EUID" -ne 0 ]; then
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echo -e "${RED}请使用 root 权限运行此脚本！(sudo -i 或者 sudo ./script.sh)${NC}"
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exit 1
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fi
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# 1. 基础环境
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function prepare_env() {
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echo -e "${GREEN}==> 开始初始化系统环境 (Ubuntu)...${NC}"
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# 关闭防火墙
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ufw disable
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systemctl stop ufw && systemctl disable ufw
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# 关闭 Swap
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swapoff -a
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sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
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# 加载内核模块
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cat <<EOF | tee /etc/modules-load.d/k8s.conf
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overlay
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br_netfilter
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EOF
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modprobe overlay
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modprobe br_netfilter
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# 【核心配置】增加 ip_nonlocal_bind，允许 HAProxy 绑定还未漂移过来的 VIP
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cat <<EOF | tee /etc/sysctl.d/k8s.conf
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net.bridge.bridge-nf-call-iptables = 1
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net.bridge.bridge-nf-call-ip6tables = 1
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net.ipv4.ip_forward = 1
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net.ipv4.ip_nonlocal_bind = 1
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EOF
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sysctl --system
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echo -e "${GREEN}==> 系统环境初始化完成。${NC}"
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}
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# 2. 安装并锁定 Containerd 1.6.x (避开 2.x 的巨坑)
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function install_containerd() {
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echo -e "${GREEN}==> 开始安装 Containerd (强制降级并锁定 1.6.x 稳定版)...${NC}"
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# 清理可能存在的旧版本或不兼容的 2.x 版本
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apt-get purge -y containerd containerd.io
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apt-get autoremove -y
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rm -rf /etc/containerd/
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apt-get update -y
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apt-get install -y apt-transport-https ca-certificates curl software-properties-common gpg
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# 配置阿里云 Docker 官方源
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install -m 0755 -d /etc/apt/keyrings
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rm -f /etc/apt/keyrings/docker.gpg
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curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | gpg --dearmor --yes -o /etc/apt/keyrings/docker.gpg
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chmod a+r /etc/apt/keyrings/docker.gpg
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echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
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apt-get update -y
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# 动态获取 1.6.x 系列的最新版本号并强制安装
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local VER=$(apt-cache madison containerd.io | grep ' 1.6.' | head -n 1 | awk -F '|' '{print $2}' | tr -d ' ')
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if [ -z "$VER" ]; then
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echo -e "${RED}无法找到 containerd.io 1.6.x 版本，请检查网络源！${NC}"
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exit 1
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fi
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echo -e "${YELLOW}匹配到稳定版本: ${VER}${NC}"
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apt-get install -y --allow-downgrades containerd.io=$VER
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# 锁定版本，防止无人值守更新将其升级到 2.x
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apt-mark hold containerd.io
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# 生成 1.6.x 兼容的默认配置
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mkdir -p /etc/containerd
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containerd config default | tee /etc/containerd/config.toml > /dev/null
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sed -i 's/SystemdCgroup = false/SystemdCgroup = true/' /etc/containerd/config.toml
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sed -i 's#registry.k8s.io/pause#registry.aliyuncs.com/google_containers/pause#g' /etc/containerd/config.toml
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systemctl daemon-reload
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systemctl enable --now containerd
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# 【核心配置】配置 crictl，消除 socket 警告
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cat <<EOF | tee /etc/crictl.yaml
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runtime-endpoint: unix:///run/containerd/containerd.sock
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image-endpoint: unix:///run/containerd/containerd.sock
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timeout: 10
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debug: false
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EOF
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echo -e "${GREEN}==> Containerd 安装配置完成。${NC}"
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}
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# 3. 安装 K8s 组件
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function install_k8s_tools() {
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echo -e "${GREEN}==> 开始安装 kubeadm, kubelet, kubectl (使用阿里云新版 APT 源)...${NC}"
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mkdir -p /etc/apt/keyrings
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rm -f /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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curl -fsSL https://mirrors.aliyun.com/kubernetes-new/core/stable/v1.28/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://mirrors.aliyun.com/kubernetes-new/core/stable/v1.28/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
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apt-get update -y
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apt-get install -y kubelet kubeadm kubectl
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apt-mark hold kubelet kubeadm kubectl
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systemctl enable --now kubelet
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echo -e "${GREEN}==> Kubernetes 组件安装完成。${NC}"
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}
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# 4. 配置负载均衡 (HAProxy + Keepalived)
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function setup_vip() {
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local STATE=$1
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local PRIORITY=$2
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echo -e "${GREEN}==> 开始配置 HAProxy 和 Keepalived (绑定的网卡: ${VIP_INTERFACE})...${NC}"
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apt-get install -y haproxy keepalived
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cat <<EOF | tee /etc/haproxy/haproxy.cfg
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global
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log /dev/log local0
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log /dev/log local1 notice
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daemon
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defaults
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mode tcp
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log global
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option tcplog
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timeout connect 10s
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timeout client 1m
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timeout server 1m
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frontend kubernetes-apiserver
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bind ${VIP}:${VIP_PORT}
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mode tcp
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default_backend kubernetes-master
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backend kubernetes-master
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mode tcp
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balance roundrobin
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option tcp-check
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server master01 ${MASTER01_IP}:6443 check
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server master02 ${MASTER02_IP}:6443 check
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server master03 ${MASTER03_IP}:6443 check
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EOF
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cat <<EOF | tee /etc/keepalived/keepalived.conf
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! Configuration File for keepalived
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global_defs {
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router_id LVS_DEVEL
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}
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vrrp_script check_haproxy {
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script "killall -0 haproxy"
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interval 3
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weight -2
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fall 10
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rise 2
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}
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vrrp_instance VI_1 {
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state ${STATE}
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interface ${VIP_INTERFACE}
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virtual_router_id 51
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priority ${PRIORITY}
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advert_int 1
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authentication {
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auth_type PASS
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auth_pass 1111
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}
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virtual_ipaddress {
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${VIP}
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}
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track_script {
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check_haproxy
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}
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}
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EOF
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systemctl restart haproxy keepalived
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systemctl enable haproxy keepalived
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echo -e "${GREEN}==> HAProxy 和 Keepalived 配置完成 (角色: ${STATE})。${NC}"
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}
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# 5. 初始化第一个 Master 节点
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function init_first_master() {
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echo -e "${YELLOW}==> 正在清理可能残留的 K8s 脏数据...${NC}"
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kubeadm reset -f
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rm -rf /etc/cni/net.d
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rm -rf $HOME/.kube/config
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echo -e "${GREEN}==> 检查 VIP 是否存活...${NC}"
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ping -c 3 ${VIP} || { echo -e "${RED}警告: 无法 ping 通 VIP ${VIP}，请确保 Keepalived 正常启动且无 IP 冲突！${NC}"; exit 1; }
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echo -e "${GREEN}==> 检查 Containerd 存活状态...${NC}"
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crictl ps > /dev/null || { echo -e "${RED}警告: 无法连接 containerd，请检查服务状态！${NC}"; exit 1; }
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echo -e "${GREEN}==> 开始初始化第一个 Master 节点...${NC}"
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kubeadm init \
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--control-plane-endpoint="${CONTROL_PLANE_ENDPOINT}" \
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--upload-certs \
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--kubernetes-version=v1.28.2 \
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--pod-network-cidr=${POD_SUBNET} \
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--service-cidr=${SERVICE_SUBNET} \
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--image-repository=registry.aliyuncs.com/google_containers
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if [ $? -eq 0 ]; then
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echo -e "${YELLOW}========================================================================${NC}"
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echo -e "${GREEN}集群初始化成功！请妥善保存上面输出的 kubeadm join 命令。${NC}"
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echo -e "${YELLOW}========================================================================${NC}"
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export KUBECONFIG=/etc/kubernetes/admin.conf
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mkdir -p $HOME/.kube
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cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
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chown $(id -u):$(id -g) $HOME/.kube/config
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echo -e "${GREEN}==> 正在部署 Calico 网络插件...${NC}"
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kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.26.1/manifests/calico.yaml
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else
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echo -e "${RED}集群初始化失败！请使用 'journalctl -xeu kubelet' 检查报错。${NC}"
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fi
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}
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# 主路由逻辑
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case "$1" in
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base)
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prepare_env
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install_containerd
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install_k8s_tools
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;;
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init-vip-master)
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setup_vip "MASTER" 100
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;;
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init-vip-backup)
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setup_vip "BACKUP" 90
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;;
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init-master)
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init_first_master
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;;
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*)
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echo -e "${YELLOW}用法: sudo $0 {base|init-vip-master|init-vip-backup|init-master}${NC}"
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echo ""
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echo "多 Master 节点高可用部署标准流程："
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echo "1. 所有节点准备环境: sudo ./install_k8s_ubuntu_final.sh base"
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echo "2. Master01 设置为主 LB: sudo ./install_k8s_ubuntu_final.sh init-vip-master"
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echo "3. 其它 Master 设置为备 LB: sudo ./install_k8s_ubuntu_final.sh init-vip-backup"
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echo "4. Master01 初始化集群: sudo ./install_k8s_ubuntu_final.sh init-master"
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echo "5. 复制输出的 join 命令，到其他 Master 和 Worker 节点上手动执行。"
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exit 1
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esac
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